This patch adds support for performance reporting private feature
for FPGA Management Engine (FME). Now it supports several different
performance counters, including 'basic', 'cache', 'fabric', 'vtd'
and 'vtd_sip'. It allows user to use standard linux tools to access
these performance counters.
e.g. List all events by "perf list"
perf list | grep fme
fme0/cache_read_hit/ [Kernel PMU event]
fme0/cache_read_miss/ [Kernel PMU event]
...
fme0/fab_mmio_read/ [Kernel PMU event]
fme0/fab_mmio_write/ [Kernel PMU event]
...
fme0/fab_port_mmio_read,portid=?/ [Kernel PMU event]
fme0/fab_port_mmio_write,portid=?/ [Kernel PMU event]
...
fme0/vtd_port_devtlb_1g_fill,portid=?/ [Kernel PMU event]
fme0/vtd_port_devtlb_2m_fill,portid=?/ [Kernel PMU event]
...
fme0/vtd_sip_iotlb_1g_hit/ [Kernel PMU event]
fme0/vtd_sip_iotlb_1g_miss/ [Kernel PMU event]
...
fme0/clock [Kernel PMU event]
...
e.g. check increased counter value after run one application using
"perf stat" command.
perf stat -e fme0/fab_mmio_read/,fme0/fab_mmio_write/, ./test
Performance counter stats for './test':
1 fme0/fab_mmio_read/
2 fme0/fab_mmio_write/
1.009496520 seconds time elapsed
Please note that fabric counters support both fab_* and fab_port_*, but
actually they are sharing one set of performance counters in hardware.
If user wants to monitor overall data events on fab_* then fab_port_*
can't be supported at the same time, see example below:
perf stat -e fme0/fab_mmio_read/,fme0/fab_port_mmio_write,portid=0/
Performance counter stats for 'system wide':
0 fme0/fab_mmio_read/
<not supported> fme0/fab_port_mmio_write,portid=0/
2.141064085 seconds time elapsed
Signed-off-by: Luwei Kang <luwei.kang@xxxxxxxxx>
Signed-off-by: Xu Yilun <yilun.xu@xxxxxxxxx>
Signed-off-by: Wu Hao <hao.wu@xxxxxxxxx>
---
v3: replace scnprintf with sprintf in sysfs interfaces.
update sysfs doc kernel version and date.
fix sysfs doc issue for fabric counter.
refine PERF_OBJ_ATTR_* macro, doesn't count on __ATTR anymore.
introduce PERF_OBJ_ATTR_F_* macro, as it needs to use different
filenames for some of the sysfs attributes.
remove kobject_del when destroy kobject, kobject_put is enough.
do sysfs_remove_groups first when destroying perf_obj.
WARN_ON_ONCE in case internal parms are wrong in read_*_count().
v4: rework this patch to use standard perf API as user interfaces.
---
drivers/fpga/Makefile | 1 +
drivers/fpga/dfl-fme-main.c | 4 +
drivers/fpga/dfl-fme-perf.c | 871 ++++++++++++++++++++++++++++++++++++++++++++
drivers/fpga/dfl-fme.h | 2 +
4 files changed, 878 insertions(+)
create mode 100644 drivers/fpga/dfl-fme-perf.c
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 4865b74..d8e21df 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_FPGA_DFL_FME_REGION) += dfl-fme-region.o
obj-$(CONFIG_FPGA_DFL_AFU) += dfl-afu.o
dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o dfl-fme-error.o
+dfl-fme-objs += dfl-fme-perf.o
dfl-afu-objs := dfl-afu-main.o dfl-afu-region.o dfl-afu-dma-region.o
dfl-afu-objs += dfl-afu-error.o
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
index 9225b68..a11c112 100644
--- a/drivers/fpga/dfl-fme-main.c
+++ b/drivers/fpga/dfl-fme-main.c
@@ -639,6 +639,10 @@ static void fme_power_mgmt_uinit(struct platform_device *pdev,
.ops = &fme_power_mgmt_ops,
},
{
+ .id_table = fme_perf_id_table,
+ .ops = &fme_perf_ops,
+ },
+ {
.ops = NULL,
},
};
diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
new file mode 100644
index 0000000..0d7768a
--- /dev/null
+++ b/drivers/fpga/dfl-fme-perf.c
@@ -0,0 +1,871 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for FPGA Management Engine (FME) Global Performance Reporting
+ *
+ * Copyright 2019 Intel Corporation, Inc.
+ *
+ * Authors:
+ * Kang Luwei <luwei.kang@xxxxxxxxx>
+ * Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
+ * Wu Hao <hao.wu@xxxxxxxxx>
+ * Xu Yilun <yilun.xu@xxxxxxxxx>
+ * Joseph Grecco <joe.grecco@xxxxxxxxx>
+ * Enno Luebbers <enno.luebbers@xxxxxxxxx>
+ * Tim Whisonant <tim.whisonant@xxxxxxxxx>
+ * Ananda Ravuri <ananda.ravuri@xxxxxxxxx>
+ * Mitchel, Henry <henry.mitchel@xxxxxxxxx>
+ */
+
+#include <linux/perf_event.h>
+#include "dfl.h"
+#include "dfl-fme.h"
+
+/*
+ * Performance Counter Registers for Cache.
+ *
+ * Cache Events are listed below as CACHE_EVNT_*.
+ */
+#define CACHE_CTRL 0x8
+#define CACHE_RESET_CNTR BIT_ULL(0)
+#define CACHE_FREEZE_CNTR BIT_ULL(8)
+#define CACHE_CTRL_EVNT GENMASK_ULL(19, 16)
+#define CACHE_EVNT_RD_HIT 0x0
+#define CACHE_EVNT_WR_HIT 0x1
+#define CACHE_EVNT_RD_MISS 0x2
+#define CACHE_EVNT_WR_MISS 0x3
+#define CACHE_EVNT_RSVD 0x4
+#define CACHE_EVNT_HOLD_REQ 0x5
+#define CACHE_EVNT_DATA_WR_PORT_CONTEN 0x6
+#define CACHE_EVNT_TAG_WR_PORT_CONTEN 0x7
+#define CACHE_EVNT_TX_REQ_STALL 0x8
+#define CACHE_EVNT_RX_REQ_STALL 0x9
+#define CACHE_EVNT_EVICTIONS 0xa
+#define CACHE_CHANNEL_SEL BIT_ULL(20)
+#define CACHE_CHANNEL_RD 0
+#define CACHE_CHANNEL_WR 1
+#define CACHE_CNTR0 0x10
+#define CACHE_CNTR1 0x18
+#define CACHE_CNTR_EVNT_CNTR GENMASK_ULL(47, 0)
+#define CACHE_CNTR_EVNT GENMASK_ULL(63, 60)
+
+/*
+ * Performance Counter Registers for Fabric.
+ *
+ * Fabric Events are listed below as FAB_EVNT_*
+ */
+#define FAB_CTRL 0x20
+#define FAB_RESET_CNTR BIT_ULL(0)
+#define FAB_FREEZE_CNTR BIT_ULL(8)
+#define FAB_CTRL_EVNT GENMASK_ULL(19, 16)
+#define FAB_EVNT_PCIE0_RD 0x0
+#define FAB_EVNT_PCIE0_WR 0x1
+#define FAB_EVNT_PCIE1_RD 0x2
+#define FAB_EVNT_PCIE1_WR 0x3
+#define FAB_EVNT_UPI_RD 0x4
+#define FAB_EVNT_UPI_WR 0x5
+#define FAB_EVNT_MMIO_RD 0x6
+#define FAB_EVNT_MMIO_WR 0x7
+#define FAB_PORT_ID GENMASK_ULL(21, 20)
+#define FAB_PORT_FILTER BIT_ULL(23)
+#define FAB_PORT_FILTER_DISABLE 0
+#define FAB_PORT_FILTER_ENABLE 1
+#define FAB_CNTR 0x28
+#define FAB_CNTR_EVNT_CNTR GENMASK_ULL(59, 0)
+#define FAB_CNTR_EVNT GENMASK_ULL(63, 60)
+
+/*
+ * Performance Counter Registers for Clock.
+ *
+ * Clock Counter can't be reset or frozen by SW.
+ */
+#define CLK_CNTR 0x30
+#define BASIC_EVNT_CLK 0x0
+
+/*
+ * Performance Counter Registers for IOMMU / VT-D.
+ *
+ * VT-D Events are listed below as VTD_EVNT_* and VTD_SIP_EVNT_*
+ */
+#define VTD_CTRL 0x38
+#define VTD_RESET_CNTR BIT_ULL(0)
+#define VTD_FREEZE_CNTR BIT_ULL(8)
+#define VTD_CTRL_EVNT GENMASK_ULL(19, 16)
+#define VTD_EVNT_AFU_MEM_RD_TRANS 0x0
+#define VTD_EVNT_AFU_MEM_WR_TRANS 0x1
+#define VTD_EVNT_AFU_DEVTLB_RD_HIT 0x2
+#define VTD_EVNT_AFU_DEVTLB_WR_HIT 0x3
+#define VTD_EVNT_DEVTLB_4K_FILL 0x4
+#define VTD_EVNT_DEVTLB_2M_FILL 0x5
+#define VTD_EVNT_DEVTLB_1G_FILL 0x6
+#define VTD_CNTR 0x40
+#define VTD_CNTR_EVNT_CNTR GENMASK_ULL(47, 0)
+#define VTD_CNTR_EVNT GENMASK_ULL(63, 60)
+
+#define VTD_SIP_CTRL 0x48
+#define VTD_SIP_RESET_CNTR BIT_ULL(0)
+#define VTD_SIP_FREEZE_CNTR BIT_ULL(8)
+#define VTD_SIP_CTRL_EVNT GENMASK_ULL(19, 16)
+#define VTD_SIP_EVNT_IOTLB_4K_HIT 0x0
+#define VTD_SIP_EVNT_IOTLB_2M_HIT 0x1
+#define VTD_SIP_EVNT_IOTLB_1G_HIT 0x2
+#define VTD_SIP_EVNT_SLPWC_L3_HIT 0x3
+#define VTD_SIP_EVNT_SLPWC_L4_HIT 0x4
+#define VTD_SIP_EVNT_RCC_HIT 0x5
+#define VTD_SIP_EVNT_IOTLB_4K_MISS 0x6
+#define VTD_SIP_EVNT_IOTLB_2M_MISS 0x7
+#define VTD_SIP_EVNT_IOTLB_1G_MISS 0x8
+#define VTD_SIP_EVNT_SLPWC_L3_MISS 0x9
+#define VTD_SIP_EVNT_SLPWC_L4_MISS 0xa
+#define VTD_SIP_EVNT_RCC_MISS 0xb
+#define VTD_SIP_CNTR 0X50
+#define VTD_SIP_CNTR_EVNT_CNTR GENMASK_ULL(47, 0)
+#define VTD_SIP_CNTR_EVNT GENMASK_ULL(63, 60)
+
+#define PERF_TIMEOUT 30
+
+#define PERF_MAX_PORT_NUM 1
+
+/**
+ * struct fme_perf_priv - priv data structure for fme perf driver
+ *
+ * @dev: parent device.
+ * @ioaddr: mapped base address of mmio region.
+ * @pmu: pmu data structure for fme perf counters.
+ * @id: id of this fme performance report private feature.
+ * @fab_users: current user number on fabric counters.
+ * @fab_port_id: used to indicate current working mode of fabric counters.
+ * @fab_lock: lock to protect fabric counters working mode.
+ * @events_group: events attribute group for fme perf pmu.
+ * @attr_groups: attribute groups for fme perf pmu.
+ */
+struct fme_perf_priv {
+ struct device *dev;
+ void __iomem *ioaddr;
+ struct pmu pmu;
+ u64 id;
+
+ u32 fab_users;
+ u32 fab_port_id;
+ spinlock_t fab_lock;
+
+ struct attribute_group events_group;
+ const struct attribute_group *attr_groups[4];
+};
+
+/**
+ * struct fme_perf_event_attr - fme perf event attribute
+ *
+ * @attr: device attribute of fme perf event.
+ * @event_id: id of fme perf event.
+ * @event_type: type of fme perf event.
+ * @is_port_event: indicate if this is a port based event.
+ * @data: private data for fme perf event.
+ */
+struct fme_perf_event_attr {
+ struct device_attribute attr;
+ u32 event_id;
+ u32 event_type;
+ bool is_port_event;
+ u64 data;
+};
+
+/**
+ * struct fme_perf_event_ops - callbacks for fme perf events
+ *
+ * @event_init: callback invoked during event init.
+ * @event_destroy: callback invoked during event destroy.
+ * @read_counter: callback to read hardware counters.
+ */
+struct fme_perf_event_ops {
+ int (*event_init)(struct fme_perf_priv *priv, u32 event,
+ u32 port_id, u64 data);
+ void (*event_destroy)(struct fme_perf_priv *priv, u32 event,
+ u32 port_id, u64 data);
+ u64 (*read_counter)(struct fme_perf_priv *priv, u32 event,
+ u32 port_id, u64 data);
+};
+
+/**
+ * struct fme_perf_event_group - fme perf groups
+ *
+ * @ev_attrs: fme perf event attributes.
+ * @num: events number in this group.
+ * @ops: same callbacks shared by all fme perf events in this group.
+ */
+struct fme_perf_event_group {
+ struct fme_perf_event_attr *ev_attrs;
+ unsigned int num;
+ struct fme_perf_event_ops *ops;
+};
+
+#define to_fme_perf_priv(_pmu) container_of(_pmu, struct fme_perf_priv, pmu)
+
+static cpumask_t fme_perf_cpumask = CPU_MASK_CPU0;
+
+static ssize_t cpumask_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return cpumap_print_to_pagebuf(true, buf, &fme_perf_cpumask);
+}
+static DEVICE_ATTR_RO(cpumask);
+
+static struct attribute *fme_perf_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static struct attribute_group fme_perf_cpumask_group = {
+ .attrs = fme_perf_cpumask_attrs,
+};
+
+#define FME_EVENT_MASK GENMASK_ULL(11, 0)
+#define FME_EVTYPE_MASK GENMASK_ULL(15, 12)
+#define FME_EVTYPE_BASIC 0
+#define FME_EVTYPE_CACHE 1
+#define FME_EVTYPE_FABRIC 2
+#define FME_EVTYPE_VTD 3
+#define FME_EVTYPE_VTD_SIP 4
+#define FME_EVTYPE_MAX FME_EVTYPE_VTD_SIP
+#define FME_PORTID_MASK GENMASK_ULL(23, 16)
+#define FME_PORTID_ROOT (0xffU)
+
+PMU_FORMAT_ATTR(event, "config:0-11");
+PMU_FORMAT_ATTR(evtype, "config:12-15");
+PMU_FORMAT_ATTR(portid, "config:16-23");
+
+static struct attribute *fme_perf_format_attrs[] = {
+ &format_attr_event.attr,
+ &format_attr_evtype.attr,
+ &format_attr_portid.attr,
+ NULL,
+};
+
+static struct attribute_group fme_perf_format_group = {
+ .name = "format",
+ .attrs = fme_perf_format_attrs,
+};
+
+static ssize_t fme_perf_event_sysfs_show(struct device *dev,
+ struct device_attribute *attr,
+ char *page)
+{
+ struct fme_perf_event_attr *ev_attr =
+ container_of(attr, struct fme_perf_event_attr, attr);
+ char *buf = page;
+
+ buf += sprintf(buf, "event=0x%02x", ev_attr->event_id);
+ buf += sprintf(buf, ",evtype=0x%02x", ev_attr->event_type);
+
+ if (ev_attr->is_port_event)
+ buf += sprintf(buf, ",portid=?\n");
+ else
+ buf += sprintf(buf, ",portid=0x%02x\n", FME_PORTID_ROOT);
+
+ return (ssize_t)(buf - page);
+}
+
+#define FME_EVENT_ATTR(_name) \
+ __ATTR(_name, 0444, fme_perf_event_sysfs_show, NULL)
+
+#define FME_EVENT_BASIC(_name, _event) { \
+ .attr = FME_EVENT_ATTR(_name), \
+ .event_id = _event, \
+ .event_type = FME_EVTYPE_BASIC, \
+ .is_port_event = false, \
+}
+
+/* data is used to save hardware channel information for cache events */
+#define FME_EVENT_CACHE(_name, _event, _data) { \
+ .attr = FME_EVENT_ATTR(cache_##_name), \
+ .event_id = _event, \
+ .event_type = FME_EVTYPE_CACHE, \
+ .is_port_event = false, \
+ .data = _data, \
+}
+
+#define FME_EVENT_FABRIC(_name, _event) { \
+ .attr = FME_EVENT_ATTR(fab_##_name), \
+ .event_id = _event, \
+ .event_type = FME_EVTYPE_FABRIC, \
+ .is_port_event = false, \
+}
+
+#define FME_EVENT_FABRIC_PORT(_name, _event) { \
+ .attr = FME_EVENT_ATTR(fab_port_##_name), \
+ .event_id = _event, \
+ .event_type = FME_EVTYPE_FABRIC, \
+ .is_port_event = true, \
+}
+
+#define FME_EVENT_VTD_PORT(_name, _event) { \
+ .attr = FME_EVENT_ATTR(vtd_port_##_name), \
+ .event_id = _event, \
+ .event_type = FME_EVTYPE_VTD, \
+ .is_port_event = true, \
+}
+
+#define FME_EVENT_VTD_SIP(_name, _event) { \
+ .attr = FME_EVENT_ATTR(vtd_sip_##_name), \
+ .event_id = _event, \
+ .event_type = FME_EVTYPE_VTD_SIP, \
+ .is_port_event = false, \
+}
+
+static struct fme_perf_event_attr fme_perf_basic_events[] = {
+ FME_EVENT_BASIC(clock, BASIC_EVNT_CLK),
+};
+
+static struct fme_perf_event_attr fme_perf_cache_events[] = {
+ FME_EVENT_CACHE(read_hit, CACHE_EVNT_RD_HIT, CACHE_CHANNEL_RD),
+ FME_EVENT_CACHE(read_miss, CACHE_EVNT_RD_MISS, CACHE_CHANNEL_RD),
+ FME_EVENT_CACHE(write_hit, CACHE_EVNT_WR_HIT, CACHE_CHANNEL_WR),
+ FME_EVENT_CACHE(write_miss, CACHE_EVNT_WR_MISS, CACHE_CHANNEL_WR),
+ FME_EVENT_CACHE(hold_request, CACHE_EVNT_HOLD_REQ, CACHE_CHANNEL_RD),
+ FME_EVENT_CACHE(data_write_port_contention,
+ CACHE_EVNT_DATA_WR_PORT_CONTEN, CACHE_CHANNEL_WR),
+ FME_EVENT_CACHE(tag_write_port_contention,
+ CACHE_EVNT_TAG_WR_PORT_CONTEN, CACHE_CHANNEL_WR),
+ FME_EVENT_CACHE(tx_req_stall, CACHE_EVNT_TX_REQ_STALL,
+ CACHE_CHANNEL_RD),
+ FME_EVENT_CACHE(rx_req_stall, CACHE_EVNT_RX_REQ_STALL,
+ CACHE_CHANNEL_RD),
+ FME_EVENT_CACHE(eviction, CACHE_EVNT_EVICTIONS, CACHE_CHANNEL_RD),
+};
+
+static struct fme_perf_event_attr fme_perf_fab_events[] = {
+ FME_EVENT_FABRIC(pcie0_read, FAB_EVNT_PCIE0_RD),
+ FME_EVENT_FABRIC(pcie0_write, FAB_EVNT_PCIE0_WR),
+ FME_EVENT_FABRIC(pcie1_read, FAB_EVNT_PCIE1_RD),
+ FME_EVENT_FABRIC(pcie1_write, FAB_EVNT_PCIE1_WR),
+ FME_EVENT_FABRIC(upi_read, FAB_EVNT_UPI_RD),
+ FME_EVENT_FABRIC(upi_write, FAB_EVNT_UPI_WR),
+ FME_EVENT_FABRIC(mmio_read, FAB_EVNT_MMIO_RD),
+ FME_EVENT_FABRIC(mmio_write, FAB_EVNT_MMIO_WR),
+
+ FME_EVENT_FABRIC_PORT(pcie0_read, FAB_EVNT_PCIE0_RD),
+ FME_EVENT_FABRIC_PORT(pcie0_write, FAB_EVNT_PCIE0_WR),
+ FME_EVENT_FABRIC_PORT(pcie1_read, FAB_EVNT_PCIE1_RD),
+ FME_EVENT_FABRIC_PORT(pcie1_write, FAB_EVNT_PCIE1_WR),
+ FME_EVENT_FABRIC_PORT(upi_read, FAB_EVNT_UPI_RD),
+ FME_EVENT_FABRIC_PORT(upi_write, FAB_EVNT_UPI_WR),
+ FME_EVENT_FABRIC_PORT(mmio_read, FAB_EVNT_MMIO_RD),
+ FME_EVENT_FABRIC_PORT(mmio_write, FAB_EVNT_MMIO_WR),
+};
+
+static struct fme_perf_event_attr fme_perf_vtd_events[] = {
+ FME_EVENT_VTD_PORT(read_transaction, VTD_EVNT_AFU_MEM_RD_TRANS),
+ FME_EVENT_VTD_PORT(write_transaction, VTD_EVNT_AFU_MEM_WR_TRANS),
+ FME_EVENT_VTD_PORT(devtlb_read_hit, VTD_EVNT_AFU_DEVTLB_RD_HIT),
+ FME_EVENT_VTD_PORT(devtlb_write_hit, VTD_EVNT_AFU_DEVTLB_WR_HIT),
+ FME_EVENT_VTD_PORT(devtlb_4k_fill, VTD_EVNT_DEVTLB_4K_FILL),
+ FME_EVENT_VTD_PORT(devtlb_2m_fill, VTD_EVNT_DEVTLB_2M_FILL),
+ FME_EVENT_VTD_PORT(devtlb_1g_fill, VTD_EVNT_DEVTLB_1G_FILL),
+};
+
+static struct fme_perf_event_attr fme_perf_vtd_sip_events[] = {
+ FME_EVENT_VTD_SIP(iotlb_4k_hit, VTD_SIP_EVNT_IOTLB_4K_HIT),
+ FME_EVENT_VTD_SIP(iotlb_2m_hit, VTD_SIP_EVNT_IOTLB_2M_HIT),
+ FME_EVENT_VTD_SIP(iotlb_1g_hit, VTD_SIP_EVNT_IOTLB_1G_HIT),
+ FME_EVENT_VTD_SIP(slpwc_l3_hit, VTD_SIP_EVNT_SLPWC_L3_HIT),
+ FME_EVENT_VTD_SIP(slpwc_l4_hit, VTD_SIP_EVNT_SLPWC_L4_HIT),
+ FME_EVENT_VTD_SIP(rcc_hit, VTD_SIP_EVNT_RCC_HIT),
+ FME_EVENT_VTD_SIP(iotlb_4k_miss, VTD_SIP_EVNT_IOTLB_4K_MISS),
+ FME_EVENT_VTD_SIP(iotlb_2m_miss, VTD_SIP_EVNT_IOTLB_2M_MISS),
+ FME_EVENT_VTD_SIP(iotlb_1g_miss, VTD_SIP_EVNT_IOTLB_1G_MISS),
+ FME_EVENT_VTD_SIP(slpwc_l3_miss, VTD_SIP_EVNT_SLPWC_L3_MISS),
+ FME_EVENT_VTD_SIP(slpwc_l4_miss, VTD_SIP_EVNT_SLPWC_L4_MISS),
+ FME_EVENT_VTD_SIP(rcc_miss, VTD_SIP_EVNT_RCC_MISS),
+};
+
+static u64 basic_read_event_counter(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ void __iomem *base = priv->ioaddr;
+
+ if (event == BASIC_EVNT_CLK)
+ return readq(base + CLK_CNTR);
+
+ return 0;
+}
+
+static struct fme_perf_event_ops fme_perf_basic_ops = {
+ .read_counter = basic_read_event_counter,
+};
+
+static u64 cache_read_event_counter(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ void __iomem *base = priv->ioaddr;
+ u8 channel = (u8)data;
+ u64 v, count;
+
+ /* set channel access type and cache event code. */
+ v = readq(base + CACHE_CTRL);
+ v &= ~(CACHE_CHANNEL_SEL | CACHE_CTRL_EVNT);
+ v |= FIELD_PREP(CACHE_CHANNEL_SEL, channel);
+ v |= FIELD_PREP(CACHE_CTRL_EVNT, event);
+ writeq(v, base + CACHE_CTRL);
+
+ if (readq_poll_timeout_atomic(base + CACHE_CNTR0, v,
+ FIELD_GET(CACHE_CNTR_EVNT, v) == event,
+ 1, PERF_TIMEOUT)) {
+ dev_err(priv->dev, "timeout, unmatched cache event code in counter register.\n");
+ return 0;
+ }
+
+ v = readq(base + CACHE_CNTR0);
+ count = FIELD_GET(CACHE_CNTR_EVNT_CNTR, v);
+ v = readq(base + CACHE_CNTR1);
+ count += FIELD_GET(CACHE_CNTR_EVNT_CNTR, v);
+
+ return count;
+}
+
+static struct fme_perf_event_ops fme_perf_cache_ops = {
+ .read_counter = cache_read_event_counter,
+};
+
+static int fabric_event_init(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ void __iomem *base = priv->ioaddr;
+ int ret = 0;
+ u64 v;
+
+ /*
+ * as fabric counter set only can be in either overall or port mode.
+ * In overall mode, it counts overall data for FPGA, and in port mode,
+ * it is configured to monitor on one individual port.
+ *
+ * so every time, a new event is initialized, driver checks
+ * current working mode and if someone is using this counter set.
+ */
+ spin_lock(&priv->fab_lock);
+ if (priv->fab_users && priv->fab_port_id != port_id) {
+ dev_dbg(priv->dev, "conflict fabric event monitoring mode.\n");
+ ret = -EOPNOTSUPP;
+ goto exit;
+ }
+
+ priv->fab_users++;
+
+ /*
+ * skip if current working mode matches, otherwise change the working
+ * mode per input port_id, to monitor overall data or another port.
+ */
+ if (priv->fab_port_id == port_id)
+ goto exit;
+
+ priv->fab_port_id = port_id;
+
+ v = readq(base + FAB_CTRL);
+ v &= ~(FAB_PORT_FILTER | FAB_PORT_ID);
+
+ if (port_id == FME_PORTID_ROOT) {
+ v |= FIELD_PREP(FAB_PORT_FILTER, FAB_PORT_FILTER_DISABLE);
+ } else {
+ v |= FIELD_PREP(FAB_PORT_FILTER, FAB_PORT_FILTER_ENABLE);
+ v |= FIELD_PREP(FAB_PORT_ID, port_id);
+ }
+ writeq(v, base + FAB_CTRL);
+
+exit:
+ spin_unlock(&priv->fab_lock);
+ return ret;
+}
+
+static void fabric_event_destroy(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ spin_lock(&priv->fab_lock);
+ priv->fab_users--;
+ spin_unlock(&priv->fab_lock);
+}
+
+static u64 fabric_read_event_counter(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ void __iomem *base = priv->ioaddr;
+ u64 v;
+
+ v = readq(base + FAB_CTRL);
+ v &= ~FAB_CTRL_EVNT;
+ v |= FIELD_PREP(FAB_CTRL_EVNT, event);
+ writeq(v, base + FAB_CTRL);
+
+ if (readq_poll_timeout_atomic(base + FAB_CNTR, v,
+ FIELD_GET(FAB_CNTR_EVNT, v) == event,
+ 1, PERF_TIMEOUT)) {
+ dev_err(priv->dev, "timeout, unmatched fab event code in counter register.\n");
+ return 0;
+ }
+
+ v = readq(base + FAB_CNTR);
+ return FIELD_GET(FAB_CNTR_EVNT_CNTR, v);
+}
+
+static struct fme_perf_event_ops fme_perf_fab_ops = {
+ .event_init = fabric_event_init,
+ .event_destroy = fabric_event_destroy,
+ .read_counter = fabric_read_event_counter,
+};
+
+static u64 vtd_read_event_counter(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ void __iomem *base = priv->ioaddr;
+ u64 v;
+
+ event += port_id;
+
+ v = readq(base + VTD_CTRL);
+ v &= ~VTD_CTRL_EVNT;
+ v |= FIELD_PREP(VTD_CTRL_EVNT, event);
+ writeq(v, base + VTD_CTRL);
+
+ if (readq_poll_timeout_atomic(base + VTD_CNTR, v,
+ FIELD_GET(VTD_CNTR_EVNT, v) == event,
+ 1, PERF_TIMEOUT)) {
+ dev_err(priv->dev, "timeout, unmatched vtd event code in counter register.\n");
+ return 0;
+ }
+
+ v = readq(base + VTD_CNTR);
+ return FIELD_GET(VTD_CNTR_EVNT_CNTR, v);
+}
+
+static struct fme_perf_event_ops fme_perf_vtd_ops = {
+ .read_counter = vtd_read_event_counter,
+};
+
+static u64 vtd_sip_read_event_counter(struct fme_perf_priv *priv,
+ u32 event, u32 port_id, u64 data)
+{
+ void __iomem *base = priv->ioaddr;
+ u64 v;
+
+ v = readq(base + VTD_SIP_CTRL);
+ v &= ~VTD_SIP_CTRL_EVNT;
+ v |= FIELD_PREP(VTD_SIP_CTRL_EVNT, event);
+ writeq(v, base + VTD_SIP_CTRL);
+
+ if (readq_poll_timeout_atomic(base + VTD_SIP_CNTR, v,
+ FIELD_GET(VTD_SIP_CNTR_EVNT, v) == event,
+ 1, PERF_TIMEOUT)) {
+ dev_err(priv->dev, "timeout, unmatched vtd sip event code in counter register\n");
+ return 0;
+ }
+
+ v = readq(base + VTD_SIP_CNTR);
+ return FIELD_GET(VTD_SIP_CNTR_EVNT_CNTR, v);
+}
+
+static struct fme_perf_event_ops fme_perf_vtd_sip_ops = {
+ .read_counter = vtd_sip_read_event_counter,
+};
+
+#define FME_EVENT_GROUP(_name) { \
+ .ev_attrs = fme_perf_##_name##_events, \
+ .num = ARRAY_SIZE(fme_perf_##_name##_events), \
+ .ops = &fme_perf_##_name##_ops, \
+}
+
+/* event group array is indexed by FME_EVTYPE_* */
+static struct fme_perf_event_group fme_perf_event_groups[] = {
+ FME_EVENT_GROUP(basic),
+ FME_EVENT_GROUP(cache),
+ FME_EVENT_GROUP(fab),
+ FME_EVENT_GROUP(vtd),
+ FME_EVENT_GROUP(vtd_sip),
+};
+
+static struct fme_perf_event_attr *
+get_event_attr(u32 event_id, u32 event_type, u32 port_id)
+{
+ bool is_port_event = (port_id != FME_PORTID_ROOT);
+ struct fme_perf_event_group *group;
+ unsigned int i;
+
+ if (event_type > FME_EVTYPE_MAX)
+ return NULL;
+
+ group = &fme_perf_event_groups[event_type];
+
+ for (i = 0; i < group->num; i++) {
+ if (event_id == group->ev_attrs[i].event_id &&
+ is_port_event == group->ev_attrs[i].is_port_event)
+ return &group->ev_attrs[i];
+ }
+
+ return NULL;
+}
+
+static struct fme_perf_event_ops *get_event_ops(u32 event_type)
+{
+ return fme_perf_event_groups[event_type].ops;
+}
+
+static void fme_perf_event_destroy(struct perf_event *event)
+{
+ struct fme_perf_event_ops *ops = get_event_ops(event->hw.event_base);
+ struct fme_perf_priv *priv = to_fme_perf_priv(event->pmu);
+
+ if (ops->event_destroy)
+ ops->event_destroy(priv, event->hw.idx,
+ event->hw.config_base, event->hw.config);
+}
+
+static int fme_perf_event_init(struct perf_event *event)
+{
+ struct fme_perf_priv *priv = to_fme_perf_priv(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ struct fme_perf_event_attr *ev_attr;
+ u32 event_id, event_type, port_id;
+ struct fme_perf_event_ops *ops;
+
+ /* test the event attr type check for PMU enumeration */
+ if (event->attr.type != event->pmu->type)
+ return -ENOENT;
+
+ /*
+ * fme counters are shared across all cores.
+ * Therefore, it does not support per-process mode.
+ * Also, it does not support event sampling mode.
+ */
+ if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
+ return -EINVAL;
+
+ if (event->cpu < 0)
+ return -EINVAL;
+
+ event_id = FIELD_GET(FME_EVENT_MASK, event->attr.config);
+ event_type = FIELD_GET(FME_EVTYPE_MASK, event->attr.config);
+ port_id = FIELD_GET(FME_PORTID_MASK, event->attr.config);
+
+ ev_attr = get_event_attr(event_id, event_type, port_id);
+ if (!ev_attr)
+ return -EINVAL;
+
+ if ((ev_attr->is_port_event && port_id >= PERF_MAX_PORT_NUM) ||
+ (!ev_attr->is_port_event && port_id != FME_PORTID_ROOT))
+ return -EINVAL;
+
+ hwc->event_base = event_type;
+ hwc->idx = (int)event_id;
+ hwc->config_base = port_id;
+ hwc->config = ev_attr->data;
+
+ event->destroy = fme_perf_event_destroy;
+
+ dev_dbg(priv->dev,
+ "%s eventid=0x%x, evtype=0x%x, portid=0x%x, data=0x%llx\n",
+ __func__, event_id, event_type, port_id, ev_attr->data);
+
+ ops = get_event_ops(event->hw.event_base);
+
+ if (ops->event_init)
+ return ops->event_init(priv, hwc->idx,
+ hwc->config_base, hwc->config);
+
+ return 0;
+}
+
+static void fme_perf_event_update(struct perf_event *event)
+{
+ struct fme_perf_event_ops *ops = get_event_ops(event->hw.event_base);
+ struct fme_perf_priv *priv = to_fme_perf_priv(event->pmu);
+ u64 now, prev, delta;
+
+ now = ops->read_counter(priv, (u32)event->hw.idx,
+ event->hw.config_base, event->hw.config);
+ prev = local64_read(&event->hw.prev_count);
+ delta = now - prev;
+
+ local64_add(delta, &event->count);
+}
+
+static void fme_perf_event_start(struct perf_event *event, int flags)
+{
+ struct fme_perf_event_ops *ops = get_event_ops(event->hw.event_base);
+ struct fme_perf_priv *priv = to_fme_perf_priv(event->pmu);
+ u64 count;
+
+ count = ops->read_counter(priv, (u32)event->hw.idx,
+ event->hw.config_base, event->hw.config);
+ local64_set(&event->hw.prev_count, count);
+}
+
+static void fme_perf_event_stop(struct perf_event *event, int flags)
+{
+ fme_perf_event_update(event);
+}
+
+static int fme_perf_event_add(struct perf_event *event, int flags)
+{
+ if (flags & PERF_EF_START)
+ fme_perf_event_start(event, flags);
+
+ return 0;
+}
+
+static void fme_perf_event_del(struct perf_event *event, int flags)
+{
+ fme_perf_event_stop(event, PERF_EF_UPDATE);
+}
+
+static void fme_perf_event_read(struct perf_event *event)
+{
+ fme_perf_event_update(event);
+}
+
+static int fme_perf_setup_attrs(struct fme_perf_priv *priv)
+{
+ struct fme_perf_event_group *group;
+ unsigned int i, idx = 0, num = 0;
+ struct attribute **attrs;
+
+ /*
+ * if feature id is FME_FEATURE_ID_GLOBAL_IPERF, hardware supports
+ * all performance counters, otherwise only basic and fabric counters.
+ */
+ num += fme_perf_event_groups[FME_EVTYPE_BASIC].num;
+ num += fme_perf_event_groups[FME_EVTYPE_FABRIC].num;
+
+ if (priv->id == FME_FEATURE_ID_GLOBAL_IPERF) {
+ num += fme_perf_event_groups[FME_EVTYPE_CACHE].num;
+ num += fme_perf_event_groups[FME_EVTYPE_VTD].num;
+ num += fme_perf_event_groups[FME_EVTYPE_VTD_SIP].num;
+ }
+
+ attrs = devm_kcalloc(priv->dev, num + 1, sizeof(*attrs), GFP_KERNEL);
+ if (!attrs)
+ return -ENOMEM;
+
+ group = &fme_perf_event_groups[FME_EVTYPE_BASIC];
+ for (i = 0; i < group->num; i++)
+ attrs[idx++] = &group->ev_attrs[i].attr.attr;
+
+ group = &fme_perf_event_groups[FME_EVTYPE_FABRIC];
+ for (i = 0; i < group->num; i++)
+ attrs[idx++] = &group->ev_attrs[i].attr.attr;
+
+ if (priv->id == FME_FEATURE_ID_GLOBAL_IPERF) {
+ group = &fme_perf_event_groups[FME_EVTYPE_CACHE];
+ for (i = 0; i < group->num; i++)
+ attrs[idx++] = &group->ev_attrs[i].attr.attr;
+
+ group = &fme_perf_event_groups[FME_EVTYPE_VTD];
+ for (i = 0; i < group->num; i++)
+ attrs[idx++] = &group->ev_attrs[i].attr.attr;
+
+ group = &fme_perf_event_groups[FME_EVTYPE_VTD_SIP];
+ for (i = 0; i < group->num; i++)
+ attrs[idx++] = &group->ev_attrs[i].attr.attr;
+ }
+
+ priv->events_group.name = "events";
+ priv->events_group.attrs = attrs;
+
+ priv->attr_groups[0] = &fme_perf_format_group;
+ priv->attr_groups[1] = &fme_perf_cpumask_group;
+ priv->attr_groups[2] = &priv->events_group;
+
+ return 0;
+}
+
+static void fme_perf_setup_hardware(struct fme_perf_priv *priv)
+{
+ void __iomem *base = priv->ioaddr;
+ u64 v;
+
+ /* read and save current working mode for fabric counters */
+ v = readq(base + FAB_CTRL);
+
+ if (FIELD_GET(FAB_PORT_FILTER, v) == FAB_PORT_FILTER_DISABLE)
+ priv->fab_port_id = FME_PORTID_ROOT;
+ else
+ priv->fab_port_id = FIELD_GET(FAB_PORT_ID, v);
+}
+
+static int fme_perf_pmu_register(struct platform_device *pdev,
+ struct fme_perf_priv *priv)
+{
+ struct pmu *pmu = &priv->pmu;
+ char *name;
+ int ret;
+
+ spin_lock_init(&priv->fab_lock);
+
+ ret = fme_perf_setup_attrs(priv);
+ if (ret)
+ return ret;
+
+ fme_perf_setup_hardware(priv);
+
+ pmu->task_ctx_nr = perf_invalid_context;
+ pmu->attr_groups = priv->attr_groups;
+ pmu->event_init = fme_perf_event_init;
+ pmu->add = fme_perf_event_add;
+ pmu->del = fme_perf_event_del;
+ pmu->start = fme_perf_event_start;
+ pmu->stop = fme_perf_event_stop;
+ pmu->read = fme_perf_event_read;
+ pmu->capabilities = PERF_PMU_CAP_NO_INTERRUPT |
+ PERF_PMU_CAP_NO_EXCLUDE;
+
+ name = devm_kasprintf(priv->dev, GFP_KERNEL, "fme%d", pdev->id);
+
+ ret = perf_pmu_register(pmu, name, -1);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void fme_perf_pmu_unregister(struct fme_perf_priv *priv)
+{
+ perf_pmu_unregister(&priv->pmu);
+}
+
+static int fme_perf_init(struct platform_device *pdev,
+ struct dfl_feature *feature)
+{
+ struct fme_perf_priv *priv;
+ int ret;
+
+ dev_dbg(&pdev->dev, "FME Perf Init\n");
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = &pdev->dev;
+ priv->ioaddr = feature->ioaddr;
+ priv->id = feature->id;
+
+ ret = fme_perf_pmu_register(pdev, priv);
+ if (ret)
+ return ret;
+
+ feature->priv = priv;
+ return 0;
+}
+
+static void fme_perf_uinit(struct platform_device *pdev,
+ struct dfl_feature *feature)
+{
+ struct fme_perf_priv *priv = feature->priv;
+
+ fme_perf_pmu_unregister(priv);
+}
+
+const struct dfl_feature_id fme_perf_id_table[] = {
+ {.id = FME_FEATURE_ID_GLOBAL_IPERF,},
+ {.id = FME_FEATURE_ID_GLOBAL_DPERF,},
+ {0,}
+};
+
+const struct dfl_feature_ops fme_perf_ops = {
+ .init = fme_perf_init,
+ .uinit = fme_perf_uinit,
+};
diff --git a/drivers/fpga/dfl-fme.h b/drivers/fpga/dfl-fme.h
index 5fbe3f5..dc71048 100644
--- a/drivers/fpga/dfl-fme.h
+++ b/drivers/fpga/dfl-fme.h
@@ -39,5 +39,7 @@ struct dfl_fme {
extern const struct dfl_feature_id fme_pr_mgmt_id_table[];
extern const struct dfl_feature_ops fme_global_err_ops;
extern const struct dfl_feature_id fme_global_err_id_table[];
+extern const struct dfl_feature_ops fme_perf_ops;
+extern const struct dfl_feature_id fme_perf_id_table[];
#endif /* __DFL_FME_H */
--
1.8.3.1
